EP0764621A2 - Compositions à base de thermite consolidée et procédé de production - Google Patents
Compositions à base de thermite consolidée et procédé de production Download PDFInfo
- Publication number
- EP0764621A2 EP0764621A2 EP96306985A EP96306985A EP0764621A2 EP 0764621 A2 EP0764621 A2 EP 0764621A2 EP 96306985 A EP96306985 A EP 96306985A EP 96306985 A EP96306985 A EP 96306985A EP 0764621 A2 EP0764621 A2 EP 0764621A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight percent
- consolidated
- powdered metal
- thermite
- oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
- C06B33/12—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being two or more oxygen-yielding compounds
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
Definitions
- This invention relates to improved thermite compositions for use in stored gas type inflators for inflatable airbag restraint systems of motor vehicles.
- Automotive supplemental inflatable restraint systems such as airbag cushion restraint systems
- pyrotechnic inflators such as inflators containing azide-based gas-generating compositions
- inflators containing azide-based gas-generating compositions to provide inflation gases for inflating the airbag cushion.
- pyrotechnic based inflators have provided acceptable airbag inflation, such systems are not without their drawbacks and disadvantages.
- ignition and burning of the pyrotechnic gas-generating materials produces undesirable hot particulate by-products which can cause damage to the airbag or a vehicle occupant.
- a considerable amount of effort has gone into producing a pyrotechnic based airbag inflation system in which the inflator traps generated hot particulate material within the inflator body itself so that it cannot escape to damage the airbag.
- considerable effort has gone into attempts to eliminate the production of such hot particulate materials.
- such pyrotechnic gas-generating compositions pose a problem due to the toxicity of the gas produced.
- hybrid inflators in which the main proportion of the inflation gases is provided by stored pressurized gas in the inflator.
- hybrid inflators generally still require the presence of pyrotechnic materials (albeit in a reduced amount) in order to provide ignition and thereby provide supplemental inflation gases and to heat the pressurized stored gas in order to arrange for the release of the stored gas, such as, for example, by providing means or additional pressure to rupture burst disks in the inflator to release the stored pressurized gas.
- thermite compositions for use in motor vehicle airbag inflators which compositions are readily able to be consolidated into pellets, grains, wafers, or the like. It is also desirable to provide such improved thermite compositions which are able to ignite at an acceptably low ignition temperature, for example, at a temperature of about 2000°C or less. It is also desirable to provide improved thermite compositions of the aforesaid properties and characteristics which compositions still generate heat producing chemical reactions generating little or no gas to augment the performance of stored pressurized gas hybrid inflators and yet still increases the temperature and performance of the stored pressurized gas inflator due to the heat generating characteristics of the improved thermite compositions.
- Improved thermite compositions for use in inflators for airbag restraint systems of motor vehicles are provided in accordance with this invention by consolidated compositions of water insoluble metal fuels and metal oxide oxidizing agents, an acceptable binder and a small amount of a supplemental oxidizing agent.
- the consolidated thermite compositions may be formed into pellets, or grains or wafers for use in automotive airbag inflators.
- the water insoluble metal fuel and metal oxide oxidizing agent, binder and supplemental oxidizing agent are mixed into a suitable slurring medium, such as water, to form a slurry which is extruded and chopped into the desired form such as pellets, grains, wafers, or the like.
- the improved thermite compositions of this invention comprise consolidated thermite compositions of water insoluble metal fuels and metal oxide oxidizers, an acceptable binder and a supplemental oxidizing agent.
- the improved thermite compositions of this invention employ finely divided metal fuels and metal oxide oxidizing agents.
- the desired exothermic reaction is produced upon ignition of the composition by oxygen breaking away from the metal oxide and reoxidizing with the metal fuel.
- Any suitable finely divided metal fuel know for use in thermite compositions may be used in the improved compositions of this invention.
- suitable finely divided metal fuels there may be mentioned, aluminum, titanium, titanium hydride, vanadium, boron and the like, preferably aluminum powder.
- metal oxide oxidizers there may be mentioned, ferric oxide (Fe 2 O 3 ), titanium oxide (TiO), cupric oxide (CuO), cobaltic oxide (Co 2 O 3 ), cobaltous ferrite (CoFe 2 O 4 ), manganese dioxide (MnO 2 ) and the like.
- the finely divided metal fuels and metal oxide oxidizers will generally have a particle size of from about 0.01 to about 300 microns and preferably from about 0.1 to about 100 microns. Most preferably, the particle size of the metal fuel will be about 5 to about 30 microns and the particle size of the metal oxide oxidizer about 0.1 to 3 microns.
- the supplemental oxidizing agent can be any acceptable oxidizing agent but is preferably ammonium perchlorate (NH 4 ClO 4 ), potassium perchlorate (KClO 4 ) or potassium chlorate (KClO 3 ) in order to improve the ignitability of the improved consolidated thermite compositions.
- hydrated calcium sulfate (CaSO 4 .2H 2 O).
- the finely divided metal fuel is generally present in an amount of from about 20 to about 30% by weight, the metal oxide oxidizer in an amount of from about 40 to about 70% by weight, the binder in an amount of from about 5 to about 25% by weight, preferably about 5 to 10% by weight, and the supplemental oxidizing agent in an amount of from about 2 to about 10% by weight.
- the binder will be employed at the lowest level at which acceptable consolidation can be achieved in order not to unduly decrease the flame temperature of the igniting composition which would undesirably reduce the ability of the igniting thermite composition to heat the stored pressurized gas. In general, therefore, it has been found that a level of binder of about 10% by weight is preferred.
- the amount of additional or supplemental oxidizing agent necessary to provide for easy ignition of the improved thermite compositions since higher levels can produce safety concerns.
- the amount of additional oxidizing agent such as potassium perchlorate, is generally about 2.0% by weight since higher levels of about 5 to 10% by weight can produce compositions that are very sensitive to electrostatic discharge.
- Component Formulation Number 1 2 3 Component weight % Aluminum metal powder (5-30 microns) 26.94 27.35 28.03 Ferric oxide (0.1-3 microns) 61.06 57.64 51.97 Potassium perchlorate 2.00 2.00 2.00 Hydrated calcium sulfate 10.00 10.00 10.00
- An improved thermite formulation of this invention is consolidated into suitable pellets, grains or wafers in the following manner, utilizing Formulation No. 1, as described above.
- the ingredients of the formulation are processed into pellets by slurry mixing the ingredients in water (about 46% by weight) into an intimate mixture of components and then extruding the slurry mixture and chopping or cutting the extruded material to form pellets of approximately 0.25 inches (6.35 mm) in diameter and 0.25 inches (6.35 mm) in length.
- the pellets material is dried to a hard consolidated shape in any suitable drying oven by driving off the water slurry medium.
- An improved consolidated thermite composition such as the pellets formed in the preceding paragraph, can be employed as the heat-producing, non gas-producing materials in hybrid inflators, especially of the co-flow type described in the aforementioned co-pending Application Serial Number 08/423,261.
- Such improved consolidated thermite compositions are capable of producing large quantities of intense heat without producing any significant amount of gas or hot particulate material.
- the improved consolidated thermite compositions ignite at an acceptable low ignition temperature, generally within the range of about 1500° to 2200°C, and generally below about 2000°C.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US533112 | 1995-09-25 | ||
US08/533,112 US5650590A (en) | 1995-09-25 | 1995-09-25 | Consolidated thermite compositions |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0764621A2 true EP0764621A2 (fr) | 1997-03-26 |
EP0764621A3 EP0764621A3 (fr) | 1998-03-04 |
Family
ID=24124533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96306985A Withdrawn EP0764621A3 (fr) | 1995-09-25 | 1996-09-25 | Compositions à base de thermite consolidée et procédé de production |
Country Status (3)
Country | Link |
---|---|
US (2) | US5650590A (fr) |
EP (1) | EP0764621A3 (fr) |
JP (1) | JPH09118581A (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001004074A1 (fr) * | 1999-07-09 | 2001-01-18 | Nippon Kayaku Kabushiki-Kaisha | Composition d'un agent activateur automatiquement inflammable |
EP1334955A2 (fr) * | 2002-02-06 | 2003-08-13 | Diehl Munitionssysteme GmbH & Co. KG | Matériaux reactifs nanostructurés |
US8555870B2 (en) | 2010-07-06 | 2013-10-15 | Heatgenie, Inc. | Package heating device and chemical compositions for use therewith |
US8864924B2 (en) | 2009-04-07 | 2014-10-21 | Heatgenie, Inc. | Solid-state thermite composition based heating device |
US9055841B2 (en) | 2009-04-07 | 2015-06-16 | Heatgenie, Inc. | Package heating apparatus |
CN114908309A (zh) * | 2022-04-02 | 2022-08-16 | 北方民族大学 | 一种抗腐蚀耐磨损复合涂层及其在钢管内表面形成涂层的工艺 |
Families Citing this family (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6214138B1 (en) * | 1997-08-18 | 2001-04-10 | Breed Automotive Technology, Inc. | Ignition enhancer composition for an airbag inflator |
US6666935B1 (en) * | 1997-09-09 | 2003-12-23 | The Regents Of The University Of California | Sol-gel manufactured energetic materials |
US6196584B1 (en) * | 1998-12-01 | 2001-03-06 | Trw Inc. | Initiator for air bag inflator |
DE20010154U1 (de) | 2000-06-07 | 2000-09-07 | Trw Airbag Sys Gmbh & Co Kg | Anzündmischung zur Verwendung in Gasgeneratoren |
US6679960B2 (en) | 2001-04-25 | 2004-01-20 | Lockheed Martin Corporation | Energy dense explosives |
JP4244365B2 (ja) * | 2001-05-10 | 2009-03-25 | 日本化薬株式会社 | 着火薬組成物、及びその着火薬組成物を用いた点火具 |
US6925937B2 (en) * | 2001-09-19 | 2005-08-09 | Michael C. Robertson | Thermal generator for downhole tools and methods of igniting and assembly |
US6652682B1 (en) * | 2001-10-17 | 2003-11-25 | The United States Of America As Represented By The Secretary Of The Navy | Propellant composition comprising nano-sized boron particles |
US6627013B2 (en) | 2002-02-05 | 2003-09-30 | Greg Carter, Jr. | Pyrotechnic thermite composition |
US7951247B2 (en) * | 2002-10-01 | 2011-05-31 | Lawrence Livermore National Security, Llc | Nano-laminate-based ignitors |
GB0312433D0 (en) * | 2003-05-30 | 2003-07-09 | Qinetiq Nanomaterials Ltd | Devices |
US8414718B2 (en) | 2004-01-14 | 2013-04-09 | Lockheed Martin Corporation | Energetic material composition |
US8066834B1 (en) * | 2005-08-04 | 2011-11-29 | University Of Central Florida Research Foundation, Inc. | Burn rate sensitization of solid propellants using a nano-titania additive |
US8697019B2 (en) | 2005-10-14 | 2014-04-15 | Inframat Corporation | Nanostructured compositions having reduced dissolution of manganese and methods of making and using the same |
EP1954634A1 (fr) * | 2005-10-14 | 2008-08-13 | Inframat Corporation | Compositions de traitement d'eau et procedes d'elaboration et d'utilisation |
US7829157B2 (en) | 2006-04-07 | 2010-11-09 | Lockheed Martin Corporation | Methods of making multilayered, hydrogen-containing thermite structures |
WO2008097241A2 (fr) | 2006-05-30 | 2008-08-14 | Lockheed Martin Corporation | Ogive à effet sélectionnable |
US7886668B2 (en) * | 2006-06-06 | 2011-02-15 | Lockheed Martin Corporation | Metal matrix composite energetic structures |
US8250985B2 (en) | 2006-06-06 | 2012-08-28 | Lockheed Martin Corporation | Structural metallic binders for reactive fragmentation weapons |
US7883593B1 (en) * | 2006-12-15 | 2011-02-08 | The United States Of America As Represented By The Secretary Of The Navy | Non-toxic pyrotechnic delay compositions |
US7955451B2 (en) * | 2007-02-22 | 2011-06-07 | Lockheed Martin Corporation | Energetic thin-film based reactive fragmentation weapons |
JP5179838B2 (ja) * | 2007-11-08 | 2013-04-10 | 日本工機株式会社 | 非火薬ガス発生器及びこれを用いた携行型拘束網展開装置 |
US20100255169A1 (en) * | 2009-04-07 | 2010-10-07 | Inonbridge Technologies, Inc. | Package heating apparatus and chemical composition |
US8839871B2 (en) | 2010-01-15 | 2014-09-23 | Halliburton Energy Services, Inc. | Well tools operable via thermal expansion resulting from reactive materials |
US20110239890A1 (en) * | 2010-04-06 | 2011-10-06 | Spritzer Michael H | Thermite-Metal Foam |
US8474533B2 (en) | 2010-12-07 | 2013-07-02 | Halliburton Energy Services, Inc. | Gas generator for pressurizing downhole samples |
US9010442B2 (en) | 2011-08-29 | 2015-04-21 | Halliburton Energy Services, Inc. | Method of completing a multi-zone fracture stimulation treatment of a wellbore |
US9151138B2 (en) | 2011-08-29 | 2015-10-06 | Halliburton Energy Services, Inc. | Injection of fluid into selected ones of multiple zones with well tools selectively responsive to magnetic patterns |
US9194669B2 (en) | 2011-11-04 | 2015-11-24 | Orbital Atk, Inc. | Flares with a consumable weight and methods of fabrication and use |
US9506324B2 (en) | 2012-04-05 | 2016-11-29 | Halliburton Energy Services, Inc. | Well tools selectively responsive to magnetic patterns |
US9169705B2 (en) | 2012-10-25 | 2015-10-27 | Halliburton Energy Services, Inc. | Pressure relief-assisted packer |
US9587486B2 (en) | 2013-02-28 | 2017-03-07 | Halliburton Energy Services, Inc. | Method and apparatus for magnetic pulse signature actuation |
US20140262320A1 (en) | 2013-03-12 | 2014-09-18 | Halliburton Energy Services, Inc. | Wellbore Servicing Tools, Systems and Methods Utilizing Near-Field Communication |
US9284817B2 (en) | 2013-03-14 | 2016-03-15 | Halliburton Energy Services, Inc. | Dual magnetic sensor actuation assembly |
US9752414B2 (en) | 2013-05-31 | 2017-09-05 | Halliburton Energy Services, Inc. | Wellbore servicing tools, systems and methods utilizing downhole wireless switches |
US20150075770A1 (en) | 2013-05-31 | 2015-03-19 | Michael Linley Fripp | Wireless activation of wellbore tools |
US9739120B2 (en) | 2013-07-23 | 2017-08-22 | Halliburton Energy Services, Inc. | Electrical power storage for downhole tools |
US9482072B2 (en) | 2013-07-23 | 2016-11-01 | Halliburton Energy Services, Inc. | Selective electrical activation of downhole tools |
DK3097265T3 (en) | 2014-03-24 | 2020-02-17 | Halliburton Energy Services Inc | Well tools having magnetic shielding for magnetic sensor |
WO2016085465A1 (fr) | 2014-11-25 | 2016-06-02 | Halliburton Energy Services, Inc. | Activation sans fil d'outils de puits de forage |
JP6404147B2 (ja) * | 2015-03-09 | 2018-10-10 | カヤク・ジャパン株式会社 | 破砕剤組成物 |
CN116478002B (zh) * | 2023-05-15 | 2024-06-07 | 湖北航天化学技术研究所 | 一种高热值低产气的启动药剂及其制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US3745077A (en) * | 1972-03-15 | 1973-07-10 | Lockheed Aircraft Corp | Thermit composition and method of making |
FR2238692A1 (fr) * | 1973-07-24 | 1975-02-21 | Dynamit Nobel Ag | |
FR2626875A1 (fr) * | 1975-12-17 | 1989-08-11 | Onera (Off Nat Aerospatiale) | Perfectionnements aux moyens d'allumage pour generateurs de gaz combustibles a masse reactive solide |
DE4226982C1 (de) * | 1992-08-14 | 1993-12-09 | Elektro Thermit Gmbh | Metallothermisches Reaktionsgemisch |
DE4311276A1 (de) * | 1993-04-06 | 1994-10-13 | Morton Int Inc | Gasgenerator |
Family Cites Families (10)
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US4084078A (en) * | 1977-02-15 | 1978-04-11 | American Service Products, Inc. | Jet perforator device |
US4585158A (en) * | 1982-04-08 | 1986-04-29 | Wardlaw Iii Louis J | Method of welding using preheating insert for heavy wall pipe |
US4832703A (en) * | 1987-10-22 | 1989-05-23 | Caldo International, Inc. | Fuel package |
FR2663924B1 (fr) * | 1990-06-27 | 1994-05-06 | Livbag Snc | Composition pyrotechnique generatrice de gaz non toxiques comportant un liant mineral et son procede de fabrication. |
US5129305A (en) * | 1990-07-03 | 1992-07-14 | Reilly Hugh T | Penetrating assault weapons |
US5178696A (en) * | 1990-09-03 | 1993-01-12 | Nippon Kayaku Kabushiki Kaisha | Gas generating composition for automobile air bag |
US5439537A (en) * | 1993-08-10 | 1995-08-08 | Thiokol Corporation | Thermite compositions for use as gas generants |
US5429691A (en) * | 1993-08-10 | 1995-07-04 | Thiokol Corporation | Thermite compositions for use as gas generants comprising basic metal carbonates and/or basic metal nitrates |
US5531845A (en) * | 1994-01-10 | 1996-07-02 | Thiokol Corporation | Methods of preparing gas generant formulations |
US5518268A (en) * | 1995-06-19 | 1996-05-21 | Morton International, Inc. | Flow-through heat-enhanced hybrid inflator |
-
1995
- 1995-09-25 US US08/533,112 patent/US5650590A/en not_active Expired - Fee Related
-
1996
- 1996-09-25 JP JP8253160A patent/JPH09118581A/ja active Pending
- 1996-09-25 EP EP96306985A patent/EP0764621A3/fr not_active Withdrawn
-
1997
- 1997-02-25 US US08/806,083 patent/US5700974A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3745077A (en) * | 1972-03-15 | 1973-07-10 | Lockheed Aircraft Corp | Thermit composition and method of making |
FR2238692A1 (fr) * | 1973-07-24 | 1975-02-21 | Dynamit Nobel Ag | |
FR2626875A1 (fr) * | 1975-12-17 | 1989-08-11 | Onera (Off Nat Aerospatiale) | Perfectionnements aux moyens d'allumage pour generateurs de gaz combustibles a masse reactive solide |
DE4226982C1 (de) * | 1992-08-14 | 1993-12-09 | Elektro Thermit Gmbh | Metallothermisches Reaktionsgemisch |
DE4311276A1 (de) * | 1993-04-06 | 1994-10-13 | Morton Int Inc | Gasgenerator |
Non-Patent Citations (1)
Title |
---|
CHEMICAL ABSTRACTS, vol. 85, no. 26, 27 December 1976 Columbus, Ohio, US; abstract no. 194932d, Y. SHIMOMURA ET AL.: "Thermits for demolishing concrete or rock structures." page 132; XP002051110 & JP 07 605 442 A (NITTETSU YOSETSU KOGYO K.K.) * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001004074A1 (fr) * | 1999-07-09 | 2001-01-18 | Nippon Kayaku Kabushiki-Kaisha | Composition d'un agent activateur automatiquement inflammable |
US6562087B1 (en) | 1999-07-09 | 2003-05-13 | Nippon Kayaku Kabushiki-Kaisha | Automatically ignitable enhancer agent composition |
CZ304826B6 (cs) * | 1999-07-09 | 2014-11-26 | Nippon Kayaku Kabushiki-Kaisha | Samozápalná kompozice podpůrného činidla |
EP1334955A2 (fr) * | 2002-02-06 | 2003-08-13 | Diehl Munitionssysteme GmbH & Co. KG | Matériaux reactifs nanostructurés |
EP1334955A3 (fr) * | 2002-02-06 | 2012-06-13 | Diehl BGT Defence GmbH & Co.KG | Matériaux reactifs nanostructurés |
US8864924B2 (en) | 2009-04-07 | 2014-10-21 | Heatgenie, Inc. | Solid-state thermite composition based heating device |
US9055841B2 (en) | 2009-04-07 | 2015-06-16 | Heatgenie, Inc. | Package heating apparatus |
US8555870B2 (en) | 2010-07-06 | 2013-10-15 | Heatgenie, Inc. | Package heating device and chemical compositions for use therewith |
CN114908309A (zh) * | 2022-04-02 | 2022-08-16 | 北方民族大学 | 一种抗腐蚀耐磨损复合涂层及其在钢管内表面形成涂层的工艺 |
CN114908309B (zh) * | 2022-04-02 | 2024-01-19 | 北方民族大学 | 一种抗腐蚀耐磨损复合涂层及其在钢管内表面形成涂层的工艺 |
Also Published As
Publication number | Publication date |
---|---|
EP0764621A3 (fr) | 1998-03-04 |
JPH09118581A (ja) | 1997-05-06 |
US5700974A (en) | 1997-12-23 |
US5650590A (en) | 1997-07-22 |
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